There are various ways to get an atom`s orbital electrons to move to a
higher energy level...

Your sentence, above, triggered some questions I have had in the back of my
mind...
In older lasers, they were referred to as "pumps", and indeed the light
souce always seemed to be "strobed."
I wonder if a LED is not "strobed", either occuring as a natural property of
the LED itself, or circuitry incorporated on the LED chip, itself, which
"strobes" it?
Mainly, I have considered the above in regards to wondering about giant
sheets of polished aluminum, focusing the sun on a laser rod (or gas tube)
and beaming the energy down to the planet (as has been proposed by others),
and if someway to "strobe" the lightsouce would have to be devised? And,
this in regards to the "pump"-ing action I have heard referenced... as, if I
understand it correctly, you must kick (pump) the electrons up a level, then
let them oscillate back to their original state, then kick-pump them
again... as the actual light is generated by the electrons shifting states,
and NOT just the fact that they are at another energy level...
It seemed to me the answer would be easy to find, from a search of the
web... I was not successful...
Your thoughts/knowledge?

Regards,
John

Indiglo uses an electroluminescent panel that's powered by an inverter.
It takes something like 100V to light it. It's probably the inverter
that's causing the RFI.

John Smith wrote:
I have a high-power LED flashlight, 5 superbright leds in the element... it
is bright, if I bring it near an AM radios I lose all reception... this rfi
is solely the product of the leds, the connecting wires and the
batteries--the flashlight housing is aluminum...
I have never checked just how large a bandwidth the rfi covers...

The LEDs may be pulsed by something resembling a square
wave duty cycle thus generating a host of harmonics.
--
73, Cecil http://www.qsl.net/w5dxp

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Actually, a "RED" in ultra-high Ghz is NOT a bad idea--I bet that is on
someones design system!
It actually would not surprize me if the military wasn't already planning a
weapon on such a device--and this is why we have not heard about it... of
course--I may have just forgotten my medication and it is those damn
delusions again! grin

Regards,
John

On Thu, 28 Apr 2005 17:52:49 -0700, "John Smith"
wrote:
Actually, a "RED" in ultra-high Ghz is NOT a bad idea--I bet that is on
someones design system!
They used to call it a MASER. If it had been such a good idea, it
would still be a good idea.

Richard:

Don't spoil the fun! sad-face

Warmest regards,
John

John Smith wrote:
"Don`t spoil the fun! sad-face"

According to my online encyclopedia, the Maser is not new. It appeared
in the Soviet Union about 1952 and was quickly adopted in the U.S.A..

Early Masers got stimulated emission in a stream of energized ammonia
molecules at 24 gigahertz.

Nobel prizes in physics were awarded in 1964 for Maser developments.

The last 40 years has seen emphasis shift to Optical Masers (Lasers).
These now have many applications from surgery to chart pointers. They
are also used to cut metal.

Not quite as many varieties as Baskin & Robbins yet, but the game is
new. Lasers come in many colors and power levels. Wavelengths are in
hundreds of nanometers. 193 nm is UV and comes from argon flouride.
10,600 nm is FIR from Carbon Dioxide. This is the metal cutter.

Find the right material and discover how to tune it to the frequency of
your choice. You may have a new HF generator. You may not have obviated
wave guides and antennas appropriate to the frequency.

Best regards, Richard Harrison, KB5WZI

Yes, I would think there are MASERs in operation somewhere... they are
interesting devices--I don't think we have heard the last of them, by a long
shot...
The information you posted is interesting, I was not aware it was a Russian
discovery, or discovered in the year I was born!
Thanks for that bit of history...

Regards,
John

On Thu, 28 Apr 2005 21:58:41 -0500, (Richard
Harrison) wrote:

The last 40 years has seen emphasis shift to Optical Masers (Lasers).
These now have many applications from surgery to chart pointers. They
are also used to cut metal.

Hi All,

When I was a kid, I had an issue of Mad Magazine that published a
commemorative piece on notable unknown inventors, one of whom was
George Foont, the inventor of the Lazier Beam. The picture showed the
proud inventor with his invention whose beam of radiation shot out a
foot or two, and then drooped to illuminate the floor in front of him.

I also recall another, more sophisticated entry from the New Yorker.
It was with an inventor and his patent lawyer standing at the street
window of the lawyer's hi-rise office. The lawyer was holding the
beam projector aimed out the window, but a look of disgust was evident
in his expression:
"Death Ray!? It doesn't even slow them down!"

73's
Richard Clark, KB7QHC